Gray its smoking alot and spitting oil out of the silencer and header connection what should I check? I replaced the 2 bent valves and seals and grinded the seats with a grinding compound and a lapping tool. It smoked bad before the valves though. I bought this bike for 450.00 and Ive enjoyed working on it a lot. It basically needed everything. I'm happy to know what I have but I'm at a point where I'm just tired of taking it apart. Like I said though it smoked before I messed with the valves at all. I'm sure the rings were right according to the manual and manufacturer directions when I installed the new piston. What should I do now? Were the valve seals bad to begin with or?